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Cancer-causing gene alone doesn't trigger pancreatic cancer, Mayo-led study finds
Date:9/10/2012

JACKSONVILLE, Fla. More than a cancer-causing gene is needed to trigger pancreatic cancer, a study led by Mayo Clinic has found. A second factor creates a "perfect storm" that allows tumors to form, the researchers say. The study, published in the Sept. 10 issue of Cancer Cell, overturns the current belief that a mutation in the KRAS oncogene is enough to initiate pancreatic cancer and unrestrained cell growth.

The findings uncover critical clues on how pancreatic cancer develops and why few patients benefit from current therapies. The findings also provide ideas about how to improve treatment and prevention of pancreatic cancer.

The research team, led by Howard C. Crawford, Ph.D., a cancer biologist at Mayo Clinic's campus in Florida, and Jens Siveke, M.D., at Technical University in Munich, Germany, found that for pancreatic cancer to form, mutated KRAS must recruit a second player: the epidermal growth factor receptor, or EGFR.A third genetic participant known as Trp53 makes pancreatic tumors very difficult to treat, the study showed.

The scientists also found that EGFR was required in pancreatic cancer initiated by pancreatic inflammation known as pancreatitis.

"We believe the perfect storm needed to trigger pancreatic cancer include KRAS mutations and inflammation in the organ, which then work synergistically to turn on EGFR," says Dr. Crawford.

"The bottom line is, without EGFR, tumors don't form and that was never known before this study," he says. "We also think that inflammation in the pancreas has a big impact on turning on E
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Contact: Kevin Punsky
punsky.kevin@mayo.edu
904-953-2299
Mayo Clinic
Source:Eurekalert

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